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[jira] [Created] (FLINK-10300) Prometheus job level metrics not removed after job finished


Helmut Zechmann created FLINK-10300:
---------------------------------------

             Summary: Prometheus job level metrics not removed after job finished
                 Key: FLINK-10300
                 URL: https://issues.apache.org/jira/browse/FLINK-10300
             Project: Flink
          Issue Type: Bug
          Components: Metrics
    Affects Versions: 1.5.3
            Reporter: Helmut Zechmann


Flink provides job level metrics for flink jobs. After a job is finished those metrics should be removed, else we run into problems when many jobs are executed on a cluster.

How to reproduce this:

Setup:
 * flink 1.5.3 in standalone mode
 * 1 JobManager
 * 1 TaskManager
 * flink-metrics-prometheus-1.5.3.jar in lib dir

Metrics config:
{code:java}
metrics.reporters: prom 
metrics.reporter.prom.class: org.apache.flink.metrics.prometheus.PrometheusReporter 
metrics.reporter.prom.port: 7000-7001
{code}
 Run the wordcount job. After running the job, job related metrics are still available:

 
{code:java}
flink_taskmanager_Status_JVM_GarbageCollector_G1_Old_Generation_Count{tm_id="ee893c28f70d285e701f838706ce8810",host="helmuts_mbp",} 1.0
# HELP flink_taskmanager_job_task_operator_numRecordsOutPerSecond numRecordsOutPerSecond (scope: taskmanager_job_task_operator)
# TYPE flink_taskmanager_job_task_operator_numRecordsOutPerSecond gauge
flink_taskmanager_job_task_operator_numRecordsOutPerSecond{job_id="2a7c77aacf6b18da389189a3bae6ff48",task_id="529e7a1eaba520b18dc7864f821ada08",task_attempt_id="3bc0d07eb56df676b088a8ec13531c98",host="helmuts_mbp",operator_id="529e7a1eaba520b18dc7864f821ada08",operator_name="DataSource__at_getDefaultTextLineDataSet_WordCountData_java:70___org_apache_flin",task_name="CHAIN_DataSource__at_getDefaultTextLineDataSet_WordCountData_java:70___org_apache_flink_api_java_io_CollectionInputFormat______FlatMap__FlatMap_at_main_WordCount_java:77______Combine__SUM_1___at_main_WordCount_java:80_",task_attempt_num="0",job_name="Flink_Java_Job_at_Fri_Sep_07_13:00:12_CEST_2018",tm_id="ee893c28f70d285e701f838706ce8810",subtask_index="0",} 0.0
...
{code}
 
 With each finished job the prometheus output gets bigger and bigger until the prometheus output fails to load.

 



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